Java Sql IN 条件拼接工具类，SqlUtils工具类

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©Copyright 蕃薯耀 2020-01-07

https://www.cnblogs.com/fanshuyao/

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang.StringUtils;

public class SqlUtils {

    /**
     * 
     * @param params List<Object>，sql执行的？参数List 
     * @param sqlBuffer StringBuffer
     * @param column String，表字段，当column=user_name，生成如下：user_name in (?,?)
     * @param values Object[]，问号（?）的数组值，
     */
    public static void setInSql(List<Object> params, StringBuffer sqlBuffer, String column, Object[] values) {
        sqlBuffer.append(" ").append("and").append(" ").append(column).append(" ").append("in (");
        for (Object obj : values) {
            if(obj != null){
                sqlBuffer.append(" ").append("?,");
                params.add(obj);
            }
        }
        sqlBuffer.delete(sqlBuffer.length() - 1, sqlBuffer.length());
        sqlBuffer.append(" ").append(")");
    }
    
    /**
     * 
     * @param params sql执行的？参数List List<Object>
     * @param sqlBuffer StringBuffer
     * @param column 表字段，当column=user_name，生成如下：user_name in (?,?)
     * @param valuesString String，以英文逗号（,）分隔的字符串
     */
    public static void setInSql(List<Object> params, StringBuffer sqlBuffer, String column, String valuesString) {
        String[] values = valuesString.split(",");
        setInSql(params, sqlBuffer, column, values);
    }
    
    
    /**
     * 字符串参数转成整型数组
     * @param valuesString
     * @return
     */
    public static Integer[] getIntegerValue(String valuesString){
        List<Integer> integerValues = new ArrayList<Integer>();
        if(!StringUtils.isBlank(valuesString)){
            if(valuesString.indexOf(",") > -1){
                String[] values = valuesString.split(",");
                for (String value : values) {
                    if(!StringUtils.isBlank(value)){
                        integerValues.add(Integer.valueOf(value.trim()));
                    }
                }
            }else{
                integerValues.add(Integer.valueOf(valuesString.trim()));
            }
            return integerValues.toArray(new Integer[integerValues.size()]);
        }
        return null;
    }
    
    /**
     * 
     * @param sqlBuffer StringBuffer
     * @param column String，表字段，当column=user_name，生成如下：user_id in (1, 2)
     * @param values Integer[]，数组值
     */
    public static void getInSql(StringBuffer sqlBuffer, String column, Integer[] values) {
        if(values == null || values.length < 1){
            throw new RuntimeException("参数值不能为空");
        }
        sqlBuffer.append(" ").append("and").append(" ").append(column).append(" ").append("in (");
        for (Integer value : values) {
            if(value != null){
                sqlBuffer.append(" ").append(value).append(",");
            }
        }
        sqlBuffer.delete(sqlBuffer.length() - 1, sqlBuffer.length());
        sqlBuffer.append(" ").append(")");
    }
    
    
    /**
     * 
     * @param sqlBuffer StringBuffer
     * @param column String，表字段，当column=user_name，生成如下：user_name in ('a','b')
     * @param values String[]，数组值
     */
    public static void getInSql(StringBuffer sqlBuffer, String column, String[] values) {
        if(values == null || values.length < 1){
            throw new RuntimeException("参数值不能为空");
        }
        sqlBuffer.append(" ").append("and").append(" ").append(column).append(" ").append("in (");
        for (String value : values) {
            if(value != null){
                sqlBuffer.append(" '").append(value).append("',");
            }
        }
        sqlBuffer.delete(sqlBuffer.length() - 1, sqlBuffer.length());
        sqlBuffer.append(" ").append(")");
    }
    
    
    public static void main(String[] args) {
        /*
        String[] values = "a".split(",");
        System.out.println(JsonUtils.toJson(values));
        
        String[] values2 = "a,b,c".split(",");
        System.out.println(JsonUtils.toJson(values2));
        */
        
        /*
        StringBuffer sqlBuffer = new StringBuffer("");
        getInSql(sqlBuffer, "id", new Integer[]{1,2,3});
        System.out.println(sqlBuffer.toString());
        getInSql(sqlBuffer, "name", new String[]{"a", "b", "cccc"});
        System.out.println(sqlBuffer.toString());
        */
        
        Integer[] values = getIntegerValue("1 ,2,4  ,5,,7");
        for (Integer integer : values) {
            System.out.println(integer);
        }
    }
    
}

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©Copyright 蕃薯耀 2020-01-07

https://www.cnblogs.com/fanshuyao/